Balancing Equations

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products along with their quantities.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Front

What does it mean to balance a chemical equation?

Back

Balancing a chemical equation means ensuring that the number of atoms of each element is the same on both sides of the equation.

Tags

NGSS.MS-PS1-5

Front

What are coefficients in a chemical equation?

Back

Coefficients are the numbers placed in front of the compounds in a chemical equation to indicate the number of molecules or moles of that substance.

Tags

NGSS.MS-PS1-5

Front

How do you determine the coefficients needed to balance an equation?

Back

To determine coefficients, adjust the numbers in front of the compounds to ensure that the number of atoms for each element is equal on both sides.

Tags

NGSS.MS-PS1-5

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Tags

NGSS.MS-PS1-5

Front

Balance the equation: __H2 + __O2 → __H2O

Back

2H2 + O2 → 2H2O

Tags

NGSS.MS-PS1-5

Front

Is the equation balanced? 2Na + Cl2 → 2NaCl

Back

Yes, the equation is balanced.

Tags

NGSS.MS-PS1-5

Front

Balance the equation: __C3H8 + __O2 → __CO2 + __H2O

Back

C3H8 + 5O2 → 3CO2 + 4H2O

Tags

NGSS.MS-PS1-5

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.

Tags

NGSS.MS-PS1-1